ShellitoIGT6e_Chapter_04_Lab_Worksheet

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Dec 6, 2023

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Geospatial Lab Application 4.1: Name: ____Maya Shastri____ GNSS Applications Question 4.1: How many GNSS satellites were being tracked by Navmatix GNSS Mission Planning on the date selected? How many of them were considered unhealthy? There were 138 satellites being tracked and 20 of them are unhealthy. Question 4.2: How many Galileo satellites were active and healthy on the date selected? 18 Satellites Question 4.3: How many BeiDou satellites were active and healthy on the date selected? 44 Satellites Question 4.4: At what specific times of day are the maximum number of GPS satellites visible for your selected date? What is this maximum number? Hint: You can move your mouse across the chart on the screen, and a tip appears, to give you the time and the satellite count that corresponds with a particular stack on the chart. These times are available in 10-minute intervals. There are the most at 2:50 AM at 16 satellites Question 4.5: At what specific times of day are the minimum number of GPS satellites visible for your selected date? What is this minimum number? There are the least at 11:10 AM at 9 satellites Question 4.6: Which satellites are visible from Orlando at 6 a.m. on the selected date? Hint: You can hover your mouse over the chart to get a tip about which satellite a bar on the chart refers to. The G03, G07, G13, G17, G19, G22, G28 and G30 satellites are visible during this time Question 4.7: Which satellites are visible from Orlando at 12:00 p.m. on the selected date?The G02, G05, G06, G12, G13, G15, G18, G19, G23, G25 and G29 are seen
Question 4.8: At 6 a.m. on the selected date, which three satellites are closest to the center position? The G37, G31, G11 and G01 Question 4.9: At 12 p.m. on the selected date, which four satellites are closest to the center position? The G05, G12, G02 and G06 are closest Question 4.10: At what time(s) of day will the maximum values for Geometric DOP (GDOP) be encountered? What is this maximum value? Hint : You can hover your cursor over a particular colored line to determine which type of DOP that line represents and get the time associated with it. The maximum value is at 6:20 AM Question 4.11: At what time(s) of day on the selected date is the maximum value for geometric DOP (GDOP) encountered? What is this maximum value? Hint: You can hover your mouse over a particular colored line to determine which type of DOP that line represents and get the time associated with it. It is 6:20 AM Question 4.12: Just based on the number of visible satellites and the ionospheric and DOP calculations, what would be the “best” (i.e., peak) time range during which to perform GPS field measurements in Orlando on the selected date, and why? I think earlier in the morning around 6AM would be best because there will not be a lot of people on the roads causing GPS traffic so it would be faster. Question 4.13: Just based on number of visible satellites and the ionospheric and DOP calculations, what would be the “worst” time range during which to perform GPS field measurements in Orlando on the selected date, and why? The worst time would be around 7:30 because the roads would be full of traffic and people using GPS during this rush hour. Question 4.14: How many geocaches are available in the database for this postal code? How many of them are located within 1 mile or less of the Orlando 32819 postal code?
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